Conrad frank



G. FRANK. BELT RIVBT.

Patented Apr. 2, 1867.

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Lettera Patent No. 63,497, dated April 2, `1867.

IMPROVED BELT RVET.

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TO WHOM IT MAY CONCERN:

Be it known that I, CONRAD FRANK, of Cincinnati, .in the county of Hamilton, and State of Ohio, have invented a certain newy and useful Belt- Rivet; .anduI hereby declare the following to be a. full,.clear, and exact description thercot', reference being had to the accompanying drawings, making a part ot' this specification.

My invention relates to a belt rivet in two parts, the same being held together by the act of screwing the one into the other. In the accompanying drawineg` Figure l represents ajoint ot' leather belting secured-by my rivet.

Figure 2 represents a section of the same, 'taken at the line X X.

Figure 3 is a perspective 'view of the rivet detached.

Figure 4 is the key by wlrich the rivet is screwed tight,

A represents theleathcr or gurmelastic of which the' belt is composed; B the socket head of the rivet; and C the other head carrying the nale screw. The heads B C have slots, b c, to enable the screwing of the-:rivets .up by an appropriate key, D. E represents the conical part ot' the rivet, being the part which comes incontact with the leather. My rivetpossesses great advantages over that almost universally in use in eticiency, convenience, and even in economy. All persons acquainted with the use ot' belting:r know that when new belts are put on the stretching of the leather makes it necessarythat theyshould be frequently tightened, which is doneA by making a fresh joint, which', as the ordinary rivet cannot atall readily be made to `give way, is done by cutting the belt 4directly through, and then-,making two joints, one on cach 'side of the ont', or by lacing with a leather thong, which both weakens the belt, and from continual attrition the lace is lia-ble to wear out. This also leaves the belt too short for a permanent joint whenever it is `desired to make it; but with my rivet the* necessity of' a. double `ioint is obviated, as it is only necessary to unscrewV thc rivets and to increasethe lap of thejoint. Economy is greatly subserved in this, that my rivet vcan he nsed. any number ot" times, whereas the ordinary rivet, necessarily of pure copper, (to admit of riveting in the soft leather,) and therefore somewhat expensive, can bc used but once; and when the destruction of'leutberl which takes place in shortening thelbelt is taken into account., my iron screw rivet will be found much the cheaper et' the two. Another great advantage possessed by my rivet consists in the convenience of making it fast', being much more'thanin the ordinary method of riveting, as requiring but one operator even in the most inconvenientsituations, and no tools but a puncturer and key, D. Although my rivet may be so easily made fast or loosened again by the proper key, it is almost impossible that it should give way by accident, as'the slots b c, in the heads B land C, allowing. the

'leather to press up through them to some extent, will operate as an anchor to'forbid rotation. notheradvantage consi. in the conica-l form of' my shank, E; the perforations in the leather being made the size of lits smaller diameter, as thershank enters it will become tightened and bind much firmer than a'rivet without such arrangement.

I am 'aware that a belt fastening has before been made with an internally threaded sleeve, and a. male screw fitting therein, to be used in connectionY with metal plates, between which the ends of' the belt are separately clamped. The advantages of my invention over the .above-are that the serew-bolts are formed with anged heads to avoid the necessity of using separate clamping plates; and secondly, that the threaded sleeve is tapered on its outside, so thatwhen inserted in an aperture of its smallest diameter, and drawn in by the action of the screw, it binds the leather as securely as if clamping plates were used.

What I claim, and desire to secure'by Letters Patent, is The combination of the internally threaded conical sleeve E, the screw F, and the two flange heads B C, all constructed as and for the purposes herein shown'and described In testimony of'which invention I- hereunto set my hand.

' CONRAD FRANK. Witnesses:

GEO. H. KNIGHT,

JAMES H. LAYMAN. 

